System_Relations Nosystem_Relations The System_Relations qualifier specifies that optimizer statistics are to be displayed for system tables (relations) and their associated indexes. If you do not specify the System_Relations qualifier, or if you specify the Nosystem_Relations qualifier, optimizer statistics are not displayed for system tables or their associated indexes. Specify the Noindex qualifier if you do not want statistics displayed for indexes defined on the system tables. The default is the Nosystem_Relations qualifier.